Adjustable valve-grinding tool.



T. G. L OISELLE & A. L. LEPAGE.

ADJUSTABLE VAL VE GRINDING TOOL.

APPLICATION FlL ED SEPT. 29, I917- Patented NOV. 26, 1918.

A nomvsr UNITED STATES PATE FFICE.

THOMAS G. LOISELLE, OF OAKVILLE, AND ALBERT L. LEPAGE, OF WATERBURY, CONNECTICUT.

ADJUSTABLE VALVE-GRINDING TOOL.

Specification of Letters Patent.

Patented Nov. 26, 1918.

siding at Oakville, county of Litchfield,

State of Connecticut, and ALBERT L. Lamar, a citizen of the United States, reslding at Waterbury, county of New Haven, State of Connecticut, have invented an Improvement in Adjustable Valve- Grinding Tools, of which the following is a specification.

This invention relates generally to valve grinding tools, with more particular reference to means for quickly and easily adjusting the tool to valves of different sizes.

It is well known that the valves usually employed in connection with internal combustion engines are of the puppet type, and that the conical bearing faces of these valves as well as the valve seats soon accumulate unevenly distributed deposits of the waste solids of combustion, commonly known as soot, thus destroying the essential. perfect fit of each valve in its seat and rendering the same leaky. The character of these valves renders it possible to grind the same, and thereby remove the ob ectionable deposits, by turning the valve under some pressure in its seat, and this was originally done by hand, the valve being provided upon its exposed face with .two oppositely-disposed holes or sockets adapted to receive the lugs or keys of spanner wrench by means of which the valve might be oscillated in its seat in various rotating positions and the" interfitting surfaces ground true.

As the valves to be ground are of different sizes, the sockets or holes therein for the reception of the engagin members of the wrench or hit are space apart at varying distances. Originally, a plurality of tools were required to grind the valves of a single engine. Subsequently, the engaging members of these tools were made adjustable,

whereby a single tool might be employed to grind valves of different sizes and, therefore, aving holes or sockets variously spaced apart.

The principal object of the present invention is the rovision of an adjustable grinding tool w ich is not only far simpler in construction than and just as efiicient and dependable in operation as present known tools of this character, but one which is much more easily and readily adjusted to meet the various conditions of what may be termed universal use in the manner outlined.

Our invention will be more readily understood by reference to the accompanying drawing, forminga part of this specification, in which We have shown a practical and convenient embodiment thereof and in which Figure 1 is a side elevation of a complete tool embodying our inventionapplied to a puppet valve, the latter and its seat being shown in section;

Fig. 2 is a fragmentary edge view of the tool proper; v

Fig. 3 is a perspective view of a screwdriver attachment adapted to be applied to and operated by the tool proper, and

Fig. 4 is a side elevation of the same as applied to the tool, showing the valve and its seat in section.

Referring now to the drawings in detail, numeral 7 designates the shank of a handle or suitable rotating implement, such as the ordinary brace 8, the lower portion of which is provided with the screw-threads 9 and opposite sides of the end of which are flattened for the reception of the plates 10 and 11 which are preferably secured thereto by means of the rivet 12. Pivoted between these plates at the ends thereof are the legs 13 and 14 which gradually taper downwardly to the usual rounded extremities adapted to be reasonably snugly received by the sockets or holes 15 and 16 in the upper face of the valve 17 in the seat 18. These legs project above the pivots 19 and 20 in the plates 10 and 11 in the form of curved arms 21 and 22, the ends of which impinge erably provided with a knurled or milledhead 24 to facilitate rotation of the same on the shank 7 and therefore render adjustable the relative vertical position of said block. The arms 21 and 22 carry the transverse rods 25 and 26, respectively, and between the ends of these rods the coil-springs 27 and 28 are tensioned, whereby these arms are spring-pressed in the direction of each other and the ends thereof against the conical face of the wedge-block 23.

It will now be apparent that when it is desired to grind the valve, the distance between the legs 13 and 14 may be quickly and readily adjusted to conform to the distance hut-ween the sockets or holes 15 and 16 in the valve 17 by turning the wedge-block 23 on the shank 7, in a direction to lower said block in case it is necessary to decrease the space between said legs and in a direction to raise said block in case it is necessary to increase this space. The springs 27 and 28 yieldingly retain the ends of the arms 21 and 22 against the conical face of the block 23, whereby lateral relative movement in either direction is imparted to the legs 13 and 14: upon raising or lowering said block.

It will be noted that through the instrumentality of the brace 8 the valve may be given the desired oscillatory movement in its seat, with more extended rotation in one direction, from time to time, to vary the position of the arc of oscillation.

It is wel known that some valves of the type shown are provided with slots instead of holes to receive the engaging member of the rotating tool. In order to adapt the tool of our invention to a slotted or grooved valve, we provide an adjunct or appurtenance therefor such as that shown in Fig. 3, which preferably consists in a flattened and dull-edged blade 29, corresponding to the end of an ordinary screw-driver, the. edge 30 of which is adapted to be inserted in a slot or groove 31 in the valve 32 (Fig. 4c). Vertical arms 33 and 34 project upwardly from the side edges of the blade 29, these arms being provided with cylindrical bores 35 and 36, respectively, to receive the ends of the legs 13 and 14 of the tool propcr, whereby the blade 29 may be turned to oscillate or rotate the same and thus oscillate or rotate the'valve 32 in. its seat.

Modifications of minor details of our improved adjustable valve-grinding tool might be readily suggested to those skilled in the art to which it appertains, and we therefore do not desire to limit our invention to this specific construction herein shown and described.

We claim as new and Letters Patent:

1. In a tool of the character described, the combination with a rotatable shank having a screw-threaded portion and having also flattened sides at or near one end, members desire to secure by naeavea pivotally supported by said threaded shanks and having legs extending in the opposite direction or above said pivots, one or more springs connecting said arms and acting to draw the same toward each other, and a conical nut or wedge-block working on the threaded portion of said shank and engaged by said arms and by which the positions apart of said legs may be varied.

2. In a tool of the character described, the combination with a shank having a screwthreaded portion and having also flattened sides at or near one end, of two separated plates rigidly attached to the flattened sides of said shanks, members pivoted between said plates, whereby they are supported by said shank, said members having legs extending in one direction from or below their pivots and curved arms extending in the opposite direction or above said pivots, one or more springs connecting said arms and acting to draw the same toward each other, and a conical nut or wedge-block working on the threaded portion of said shank and engaged by said arms and by which the positions apart of said legs may be varied, said nut or wedge-block having a knurled portion by which it can be readily turned.

3. In a tool of the character described, the combination with a shank having a screwthreaded portion and having also flattened sides at or near one end, or" two separated plates rigidly attached to the flattened sides of said shanks, members pivoted between said plates and having legs extending in one direction from or below their pivots and arms extending in the opposite direction or above said pivots, one or more springs connected with and tensioned between said. arms and tending to draw the same toward each other, a conical nut or wedge-block on the threaded portion of said shank and engaged by said arms and by which the positions apart of said legs may be varied, and a blade member or tool having sockets for the reception of said legs.

In testimony whereof we afiix our signatures.

THOMAS G. LOISELLE. ALBERT L. LEPAGE. 

